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Extra Solar Planets Interactive
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1
Proteins are made of chains of
A)amino acids
B)cells
C)nucleic acids
D)chromosomes
2
Which of the following is one of the characteristics of water that make it crucial to terrestrial life?
A)it is odorless
B)is has a density greater than that of air
C)it is an excellent solvent
D)it freezes
3
About how long ago did life originate on Earth?
A)35 million year
B)350 million years
C)3.5 billion years
D)35 billion years
4
Possible evidence of life has been discovered in a meteorite that originated on what solar system body?
A)Europa
B)Mars
C)the Moon
D)Titan
5
Planets orbiting other stars have been discovered by measuring
A)eclipses
B)radio radiation
C)Doppler shifts
D)parallaxes
6
The planets discovered to be orbiting other solar-type stars have masses that are
A)greater than that of the Sun
B)similar to that of Jupiter
C)like that of the Earth
D)much less than Earth's
7
The habitable zone of the solar system includes which planets?
A)Earth alone
B)only Earth and Venus
C)only Earth and Mars
D)Venus, Earth, and Mars
8
About how long will it take the Voyagers to reach the distance of the nearest stars?
A)a few centuries
B)a few thousand years
C)almost a hundred thousand years
D)millions of years
9
Attempts at interstellar communication are collectively called
A)NASA
B)VLA
C)MACHO
D)SETI
10
Why is the frequency range between 1 and 10 GHz particularly favorable for interstellar communication?
A)1 and 10 are nice round numbers
B)background noise is at a minimum in that range
C)we have already received signals in that range
D)it is easiest to build radio telescopes that operate in that range





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